Movie War Mega Max featured the first seven Kamen Riders (Kamen Rider 1, 2, V3, Riderman, X, Amazon, and Stronger) to commemorate the franchise's 40th anniversary. Trailers for the film shown during airings of Fourze also showed the return of Kamen Rider Double as well as a new form for Kamen Rider OOO. Unlike previous Movie War films, where they were divided into 3 segments, Movie War Mega Max is divided into 5 parts. Like previous Movie War films the secondary Kamen Rider of Kamen Rider Fourze, Kamen Rider Meteor, made his debut in the film.
| Writing | Yasuko Kobayashi | Screenplay |
| Directing | Koichi Sakamoto | Director |
| Crew | Ryō Yokata | Stunts |
| Crew | Jiro Okamoto | Stunts |
| Sound | Shō Ayanokōji | Theme Song Performance |
| Crew | Satoshi Fujita | Stunts |
| Crew | Seiji Takaiwa | Stunts |
| Crew | Jun Watanabe | Stunts |
| Editing | Hiroshi Sunaga | Editor |
| Crew | Sanae Hitomi | Stunts |
| Sound | Shuhei Naruse | Music |
| Sound | Marty Friedman | Theme Song Performance |
| Sound | Kotaro Nakagawa | Music |
| Crew | Masashi Takada | Stunts |
| Crew | Eitoku | Stunts |
| Writing | Kazuki Nakashima | Writer |
| Camera | Koji Kurata | Director of Photography |
